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BQ2023 Datasheet Advanced Battery Monitor

Manufacturer: Texas Instruments

Overview: bq2023 SINGLEĆWIRE ADVANCED BATTERY MONITOR IC FOR CELLULAR AND PDA APPLICATIONS SLUS480B – MAY 2001 D Multifunction Monitoring IC Designed to Work With an Intelligent Host Controller: – Provides Accurate State of Charge Information for Rechargeable Batteries – Enhances Power and Charge Management in the System D Supply Operation Down to 2.4 V; Ideal for Single-Cell Li-Ion or Li-Pol Applications D Communicates Over Single-Wire SDQ Serial Interface D Resolves Signals Down to 3.05 µVh D High-Accuracy Coulometric Charge and Discharge Current Integration D Differential Current Sense Input D Automatic and Continuous Offset Calibration and Compensation D 32 Bytes of General-Purpose RAM, 224 Bytes of FLASH, and 8 Bytes of Secure ID ROM D Internal Temperature Sensor With 0.25°K Resolution Eliminates the Need for an External Thermistor D Programmable Digital Output Port D Battery-Pack Removal Detection Input Places the IC in the Sleep Mode When System Is Not Present D High-Accuracy Internal Timebase Eliminates External Crystal Oscillator D Low Power Consumption: – Operating: 40 µA – Sleep: 1.

General Description

The bq2023 is an advanced battery monitoring IC that accurately measures the charge and discharge currents in rechargeable battery packs.

Intended for pack integration, the bq2023 contains all the necessary functions to form the basis for an accurate battery gas gauge in cellular phones, PDAs, or other portable products.

RBI VCC VSS SDQ PW PACKAGE (TOP VIEW) 1 8 2 7 3 6 4 5 STAT SRP SRN PDET Gas gauging is accomplished by coulomb counting (i.e., measuring the charge input to and subsequently removed from the battery).

BQ2023 Distributor